[blink] Remove IsFinished check for TextForInspector

There are some edge cases where IsLoaded is true but IsFinishedInternal
is not (yet) true, so remove that check and expand the comment.

Bug: 865098
Bug: 899217
Bug: 909858
Change-Id: I886df54c9a373e7431938aadd4a6a1a4d256d7dc
Reviewed-on: https://chromium-review.googlesource.com/c/1369789
Reviewed-by: Hiroshige Hayashizaki <hiroshige@chromium.org>
Reviewed-by: Kouhei Ueno <kouhei@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#615468}(cherry picked from commit 3e255aed3c9924035b27ed04226f1dbd22d6884e)
Reviewed-on: https://chromium-review.googlesource.com/c/1388819
Cr-Commit-Position: refs/branch-heads/3626@{#502}
Cr-Branched-From: d897fb137fbaaa9355c0c93124cc048824eb1e65-refs/heads/master@{#612437}
1 file changed